<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价(元)</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计(元)</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartInfoList" :key="cart.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked === 1"
              @change="updateChecked(cart, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <div class="con5-wrapper">
              <a
                href="javascript:void(0)"
                class="mins"
                @click="handler('minus', -1, cart)"
                >-</a
              >
              <input
                autocomplete="off"
                type="text"
                minnum="1"
                class="itxt"
                :value="cart.skuNum"
                @change="handler('change', $event.target.value * 1, cart)"
              />
              <a href="javascript:void(0)" class="plus" @click="handler('add', 1, cart)"
                >+</a
              >
            </div>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <div class="con7-wrapper">
              <a class="sindelet" @click="deleteCartById(cart)">删除</a>
              <br />
              <a href="#none">移到收藏</a>
            </div>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="isAllChecked && cartInfoList.length > 0"
          @click="updateAllChecked"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteAllChecked">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'
import throttle from 'lodash/throttle'
export default {
  name: 'ShopCart',
  mounted() {
    this.getData()
  },
  methods: {
    getData() {
      this.$store.dispatch('getCartList')
    },
    //修改产品个数
    handler: throttle(async function (type, disNum, cart) {
      //type: 区分是'＋'还是'-'还是'直接输入'的
      //disNum: 变化量(1,-1),手动修改input后的数据
      //cart: 产品信息
      switch (type) {
        case 'add':
          disNum = 1
          break
        case 'minus':
          /* if (cart.skuNum > 1) {
            disNum = -1
          } else {
            disNum = 0
          } */
          disNum = cart.skuNum > 1 ? -1 : 0
          break
        case 'change':
          //用户输入量非法
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0
          } else {
            disNum = parseInt(disNum) - cart.skuNum
          }
      }
      try {
        await this.$store.dispatch('reqAddToCart', {
          skuId: cart.skuId,
          skuNum: disNum
        })
        this.getData()
      } catch (error) {}
    }, 1000),
    //删除购物车中的商品
    async deleteCartById(cart) {
      try {
        await this.$store.dispatch('deleteCartById', cart.skuId)
        this.getData()
      } catch (error) {
        alert(error.message)
      }
    },
    //修改商品勾选状态
    async updateChecked(cart, event) {
      try {
        let isChecked = event.target.checked ? '1' : '0'
        await this.$store.dispatch('checkCartById', { skuId: cart.skuId, isChecked })
        this.getData()
      } catch (error) {
        alert(error.message)
      }
    },
    //删除全部选中商品
    async deleteAllChecked() {
      try {
        await this.$store.dispatch('deleteAllChecked')
        this.getData()
      } catch (error) {
        alert(error.message)
      }
    },
    //全选
    async updateAllChecked(event) {
      try {
        let isChecked = event.target.checked ? '1' : '0'
        await this.$store.dispatch('updateAllChecked', isChecked)
        this.getData()
      } catch (error) {
        alert(error.message)
      }
    }
  },
  computed: {
    ...mapGetters(['cartList']),
    //购物车数据
    cartInfoList() {
      return this.cartList.cartInfoList || []
    },
    //总价
    totalPrice() {
      let sum = 0
      this.cartInfoList.forEach((item) => {
        sum += item.skuNum * item.skuPrice
      })
      return sum
    },
    //是否全选
    isAllChecked() {
      return this.cartInfoList.every((item) => item.isChecked == 1)
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  margin-bottom: 20px;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 7%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 17%;
      }
    }

    .cart-body {
      margin: 0;
      border-left: 1px solid #ddd;
      border-right: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          display: flex;
          justify-content: center;
          width: 7%;
        }

        .cart-list-con2 {
          display: flex;
          justify-content: center;
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          display: flex;
          justify-content: center;
          width: 17%;
        }

        .cart-list-con5 {
          width: 17%;
          display: flex;
          justify-content: center;
          .con5-wrapper {
            .mins {
              height: 16px;
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 32px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              height: 16px;
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }
        }

        .cart-list-con6 {
          display: flex;
          justify-content: center;
          width: 17%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 17%;
          display: flex;
          justify-content: center;
          .con7-wrapper {
            a {
              cursor: pointer;
              color: #666;
              &:hover {
                color: #e1251b;
              }
            }
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;
    border-top: 0px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
